#include <iostream>
#include <string>

using namespace std;

void Swap_Func(int & val_1 ,int &val_2)
{
    int temp = val_2;
    val_2 = val_1 ;
    val_1 = temp;
}

void Swap_Func(int & val_1 ,int &val_2 ,int val =10)
{
    int  temp = val_2;
    val_2 = val_1 ;
    val_1 = temp;
}

void Func(const int &val)
{
    cout << "我是一号"<< val << endl;

}

void Func(int & val)
{
    cout << "我是二号" << val << endl;
}

int main(int argc, char const *argv[])
{
    int val_int_1 = 50;
    int val_int_2 = 70;

    Swap_Func(val_int_1 ,val_int_2 ,70);

    Func(70);
    
    
    return 0;
}
